31112423010020 has 48 divisors (see below), whose sum is σ = 71276349549888. Its totient is φ = 11313510456960.

The previous prime is 31112423010001. The next prime is 31112423010023. The reversal of 31112423010020 is 2001032421113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31112423009974 and 31112423010001.

It is not an unprimeable number, because it can be changed into a prime (31112423010023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27873794 + ... + 28968486.

It is an arithmetic number, because the mean of its divisors is an integer number (1484923948956).

Almost surely, 2^{31112423010020} is an apocalyptic number.

It is an amenable number.

31112423010020 is an abundant number, since it is smaller than the sum of its proper divisors (40163926539868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31112423010020 is a wasteful number, since it uses less digits than its factorization.

31112423010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223900 (or 1223898 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31112423010020 its reverse (2001032421113), we get a palindrome (33113455431133).

The spelling of 31112423010020 in words is "thirty-one trillion, one hundred twelve billion, four hundred twenty-three million, ten thousand, twenty".